Limited availability
å®å ¨ãªã³ã³ããã¹ãç¨: ãã®æ©è½ã¯ä¸é¨ã¾ãã¯ãã¹ã¦ã®å¯¾å¿ãã¦ãããã©ã¦ã¶ã¼ã«ããã¦ãå®å ¨ãªã³ã³ããã¹ã (HTTPS) ã§ã®ã¿å©ç¨ã§ãã¾ãã
FileSystemWritableFileStream
ã¤ã³ã¿ã¼ãã§ã¤ã¹ã® write()
ã¡ã½ããã¯ããã®ã¡ã½ãããå¼ã°ãããã¡ã¤ã«ã®ç¾å¨ã®ãã¡ã¤ã«ã«ã¼ã½ã«ãªãã»ããã«ãã¼ã¿ãæ¸ãè¾¼ã¿ã¾ãã
ã¹ããªã¼ã ãéããã¾ã§ã夿´ã¯å®éã®ãã¡ã¤ã«ã«ã¯ä¸åæ¸ãè¾¼ã¾ãã¾ããã é常ã夿´ã¯ãããã«ä¸æãã¡ã¤ã«ã«æ¸ãè¾¼ã¾ãã¾ãããã®ã¡ã½ããã¯ãã¹ããªã¼ã å ã§æ¸ãè¾¼ãä½ç½®ãç§»åãããããã¡ã¤ã«ãåãè©°ãã¦ãã¡ã¤ã«å ¨ä½ã®ãã¤ãæ°ã夿´ããããããã¨ã«ã使ç¨ã§ãã¾ãã
æ§æ 弿°data
ãã¡ã¤ã«ã«æ¸ãè¾¼ããã¼ã¿ã表ã ArrayBuffer
ã»TypedArray
ã» DataView
ã»Blob
ã»String
ãªãã¸ã§ã¯ãã»æååãªãã©ã«ã®ããããã§ãã ãããã¯ã以ä¸ã®ããããã£ãæã¤ãªãã¸ã§ã¯ãã§ãã
type
"write"
ã»"seek"
ã»"truncate"
ã®ããããã®æååã§ãã
data
ãã¡ã¤ã«ã«æ¸ãè¾¼ããã¼ã¿ã§ããArrayBuffer
ã»TypedArray
ã»DataView
ã» Blob
ã»String
ãªãã¸ã§ã¯ãã»æååãªãã©ã«ã®ããããã§ãã type
ã write
ã«è¨å®ããã¦ããã¨ãã¯å¿
é ã§ãã
position
type
ã seek
ã®ã¨ããç¾å¨ã®ãã¡ã¤ã«ã«ã¼ã½ã«ã®ç§»åå
ã®ãã¤ãä½ç½®ã表ãã¾ãã type
ã write
ã®ã¨ãã«ãè¨å®ãããã¨ãã§ãããã®å ´åã¯æ¸ãè¾¼ã¿ã®éå§ä½ç½®ã表ãã¾ãã
size
ã¹ããªã¼ã ãä¿æããã¹ããã¤ãæ°ã表ã unsigned long
å¤ã§ãã type
ã truncate
ã«è¨å®ããã¦ããã¨ãã¯å¿
é ã§ãã
undefined
ã§è§£æ±ºãã Promise
ãè¿ãã¾ãã
NotAllowedError
DOMException
PermissionStatus
ã granted
ã§ãªãã¨ãè¿ããã¾ãã
TypeError
data
ã undefined
ã§ããããposition
ã¾ã㯠size
ãç¡å¹ãªå¤ã®ã¨ãè¿ããã¾ãã
InvalidStateError
DOMException
position
ãåå¨ãããã¤ãæ°ãã大ããå¤ã«è¨å®ããã¦ããã¨ãè¿ããã¾ãã
ãã®éåæé¢æ°ã¯ãSave Fileãããã«ã¼ãéãã¾ãããã®ããã«ã¼ã¯ããã¡ã¤ã«ã鏿ããã㨠FileSystemFileHandle
ãè¿ãã¾ãã ãã®ãã³ãã«ãããFileSystemFileHandle.createWritable()
ã¡ã½ãããç¨ãã¦æ¸ãè¾¼ã¿å¯è½ãªã¹ããªã¼ã ã使ãã¾ãã
ããã¦ãã¦ã¼ã¶ã¼ãæå®ãã Blob
ãã¹ããªã¼ã ã«æ¸ãè¾¼ã¾ããã¹ããªã¼ã ãéãããã¾ãã
async function saveFile() {
// æ°ãããã³ãã«ã使ãã
const newHandle = await window.showSaveFilePicker();
// æ¸ãè¾¼ã¿å
ã® FileSystemWritableFileStream ã使ãã
const writableStream = await newHandle.createWritable();
// ãã¡ã¤ã«ã«æ¸ãè¾¼ã
await writableStream.write(imgBlob);
// ãã¡ã¤ã«ãéãããã¼ã¿ããã£ã¹ã¯ã«æ¸ãè¾¼ã
await writableStream.close();
}
以ä¸ã§ã¯ãwrite()
ã¡ã½ããã«æ¸¡ããã¨ãã§ããç°ãªããªãã·ã§ã³ã®ä¾ã示ãã¾ãã
// ãã¼ã¿ã ããæ¸¡ã (ãªãã·ã§ã³ãªã)
writableStream.write(data);
// ã¹ããªã¼ã ã«æå®ã®ä½ç½®ãããã¼ã¿ãæ¸ãè¾¼ã
writableStream.write({ type: "write", position, data });
// ç¾å¨ã®ãã¡ã¤ã«ã«ã¼ã½ã«ãªãã»ãããæå®ã®ä½ç½®ã«ç§»åãã
writableStream.write({ type: "seek", position });
// ãã¡ã¤ã«ã size ãã¤ãã«ãã
writableStream.write({ type: "truncate", size });
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